Received my gro tabs.
I've used 2 so far and I'm checking parameters everyday. If everything continues to test well I'll add two more next water change and so forth.
I put one under my Aflame echinodorus, and Red devil echinodorus.
You diffenetly want to insert them fast, they do start to disintegrate.

Hey I'll be interested to hear how your swordplants respond.

Yes it is important to position the tabs before they soften in the water.